发明名称 |
METHOD AND SYSTEM FOR SPEECH CODING |
摘要 |
A method and device for use in conjunction with an encoder for encoding an audio signal into a plurality of parameters. Based on the behavior of the parameters, such as pitch, voicing, energy and spectral amplitude information of the audio signal, the audio signal can be segmented, so that the parameter update rate can be optimized. The parameters of the segmented audio signal are recorded in a storage medium or transmitted to a decoder so as to allow the decoder to reconstruct the audio signal based on the parameters indicative of the segment audio signals. For example, based on the pitch characteristic, the pitch contour can be approximated by a plurality of contour segments. An adaptive downsampling method is used to update the parameters based on the contour segments so as to reduce the update rate. At the decoder, the parameters are updated at the original rate. |
申请公布号 |
WO2005041169(A3) |
申请公布日期 |
2005.07.28 |
申请号 |
WO2004IB02652 |
申请日期 |
2004.08.13 |
申请人 |
NOKIA CORPORATION;NOKIA INC.;RAEMOE, ANSSI;NURMINEN, JANI;HIMANEN, SAKARI;HEIKKINEN, ARI |
发明人 |
RAEMOE, ANSSI;NURMINEN, JANI;HIMANEN, SAKARI;HEIKKINEN, ARI |
分类号 |
G10L;G10L11/06;G10L19/02;G10L19/04;G10L19/14;G10L21/04;H04B1/06;H04M11/00 |
主分类号 |
G10L |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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